Restore Hammer performance settings: * Enable --implicit-cache to re-use cached dependency info. * Re-use previous MD5 checksums if the timestamp hasn't changed. Review URL: http://codereview.chromium.org/60092
Restore Hammer performance settings:
* Enable --implicit-cache to re-use cached dependency info.
* Re-use previous MD5 checksums if the timestamp hasn't changed.
Review URL: http://codereview.chromium.org/60092

git-svn-id: e7e1075985beda50ea81ac4472467b4f6e91fc78@423 78cadc50-ecff-11dd-a971-7dbc132099af

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